Bone marrow is the soft, fatty tissue inside large bones like the hip and thigh bones. It develops the body's red blood cells that carry oxygen, white blood cells that fight infections, and platelets ...

The ears are a pair of sensory organs whose primary functions are hearing and balance. They are divided into three portions: the outer ear, the middle ear, and the inner ear. Each has an intricate ...

Fieser, L. F., and Fieser, M., Natural Products Related to Phenanthrene (third ed.), 204 (Reinhold, New York, 1949). Fieser, L. F., and Fieser, M., Steroids, 177 ...